Lubricator for motor-bearings.



UNIT. STATES @PATENT OFFICE.

JAMES ARCHIBALD CRAIG, OF TORONTO, ONTARIO, CANADA, ASSIGNOR, BY DIRECT AND MLSNE ASSIGNMENTS, TO SAMUEL EDGAR FLEMING,

Specification of Letters Patent.

MOTOR-BEARINGS.

Patented Dec. 25, 1906.

Application tiled January 6,1906. Serial Nc. 294.909.

To all zal/2,0m it 77u03/ concern.-

Be it known that I, JAMEs ARCHIBALD CRAIG, a subject of the King of Great Britain, residing at 673 Spadina avenue, in the city of Toronto, in the Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Lubricators for Motor-Bearings, of which the following is a specification.

This invention relates to improvements in lubricators, as shown in the present specification and illustrated by the accompanying drawings, that form part of the same.

The invention consists, essentially, of a fixed and open easing secured over the bearing and communicating therewith, a metal lining to said casing having an orifice through the bottom thereof, and a rod having a spread portion intermediate of its ends and extending through said orifice at its lower end, lightly resting on said shaft.

The objects of the invention are to devise a means of lubrication in which the heat generated by the rapid rotation of the shaft will be communicated to the oil-receptacle and to insure the lubrication of the bearing in emergencies, caused by the oil-receptacle not being properly replenished.

In the drawings, Figure l is an elevation of a motor, showing the application of the invention thereto. Fig. 2 is an enlarged sectional perspective view of the lubricator and a portion of the shaft. FiO. 3 is an enlarged perspective detail of the ining, partially broken away. Fig. A is an enlarged perspective detail of the packing between the lining and the top of the outer casing. Fig. 5 is an enlarged perspective detail of a false bottom to the lining.

Like letters of reference indicate corresponding parts in each figure.

In the present specification the description of this invention will be confined to the application of the lubricating device to a motor-casing, though it must be understood that the invention may be applied in many different ways, according to the different forms of machines to which it may be at tached for lubricating the bearings thereof, and it is for convenience that it is described herein as a part of an electric-motor construction.

[ Referring to the drawings, a is the motorcasing, having the extending portions Z) at each end thereof, forming orifices c, through which the shaft d of the motor extends.

e designates stationary bushings inserted into the orifices c and encircling the shaft CZ and having the outturned flanges f at their outer ends and the openings g in their upper sides.

7L designates openings through the extending portions b, registering with the openings g.

t designates open casings extending vertically froin the upper side of the extending portions b and preferably forming part therewith and located immediately over the said openings 7L.

y' designates linings, here shown as rectangurin shape and of corresponding dimensions to fit within the casings i, having the upper portion thereof projecting above the said casingsfi. The linings are preferably formed of copper or of any heat-conducting material.

lc is a tube inserted in the orifice Z through the bottom of the linings having the upper beveled edge m and the holes a immediately above the bottom of the linings The tube is fixedly secured to the sides of the orifice l, having the greater portion thereof projecting above the said bottom of the linings and a small projecting part therebeneath. o is a false bottom to said linings y', having the donuiwardly-extending supportingflanges p and the central orifice Q, the edge of said orifice 1 surrounding the top of the beveled edge m, thus dividing the lining into the upper and lower compartments.

r is a rod, preferably of copper and forming the means of communicating the heat from the bearing to the interior of the oillining.

The rod 7' is inserted through the tube c and passes through the openings 7L and g, having its lower end resting on the periphery of the shaft d. The said rod 1 is slightly spread at s to obstruct its further passage through the said tube. It will be thus seen that on the rotation of the shaft d the heat generated by its friction with the copper rod is communicated to the oil in the lining, which will hasten the passage of the oil down between the said rod and the inner wall of the tube 7c, and so on to the journal to be lubricated, where the oil distributes itself throughout the bearing in the usual manner.

The lower chamber formed by the false bottom o is filled with hard grease, which only passes on to the journal through the orifices Z on the abnormal heating of such parts as the tube k, the false bottom 0, and the fianges j). This greater heat is only produced when the bearing runs hot from the lack of supply of the oil in the upper chamber. In other words, when from inattention the oil in the upper chamber completely runs out the hard grease begins to run from the friction of the shaft with the bushings e. This friction will of course heat up the bushings, the casings, the lining, and in fact all parts, eventually reaching the hard grease and causing it to flow, thus efectually providing an emergency-lubricator.

t is a packing, here shown as rectangular in shape and made of rubber, though it will be readily understood that this packing may-be made of any suitable material and of any shape to suit the box. 'Ihe packing t surrounds the lining j closely and is forced down u ntil it comes in contact with the tops of the casings i.

u is a thin metal sheeting to protect the packing t and of corresponding shape. The said packing t and sheeting fu. have a downwardly-extending portion fitting over the outer edge of the casings '21, so that there is no possibility of dirt or grit of any kind reaching the bearing between the said linings and the casings fi.

i; is a'cap covering the lining w is a metal facing, preferably of Babbitt metal, on the outside of the bottom of the lining where it abuts the bottom of the casing 7l. This facing will prevent wear of the bottom of the lining, as the said lining is not a very close fit in the casing i, but is held in place by the aforesaid packing engaging the saidcup and the top of the casing i.

This invention is particularly applicable to motors used in street-railway work, but

may be applied, as stated in the foregoing description, generally.

As before mentioned, t-he chamber beneath the false bottom and the real bottom of the lining is filled with hard grease and above the false bottom with a lubricating-oil. A cap or cover is then fitted over the top of the box, and the device is complete and ready for use.

In the application of the invention to other machines the shape of the outer casing, and l consequently the shape of the lining, may be altered to suit existing conditions, though the salient features will remain the same.

What I claim as my invention is- 1. In a lubricator for a motor-bearing, the combination with a xed and open casing secured over a bearing and communicating therewith, of a metal lining to said casing having an oriiice through the bottom thereof, a false bottom supported above said real bottom and having a central orifice, a perforated tube iixedly secured in the orifice through said lining and extending upwardly through the orifice in said false bottom, and a rod of lesser diameter than said tube extending therethrough and resting lightly on a shaft and having a spread portion above said tube, as and for the purpose specified.

2. In a lubricator for a motor-bearing, the combination with a fixed and open casing secured over said bearing and communicating therewith, of a metal lining to said casing having an oriiice through the bottom thereof, a partition forming a false bottom and dividing the chamber contained in said lininginto upper and lower compartments, said upper compartment containing oil and said lower compartment containing hard grease, and having an orifice in alinement and corresponding with the aforesaid orifice, a perfo rated tube ixedly secured extending through said partition, lining-bottom and hard'grease, and a rod having a spread portion above said partition and extending through to the shaft and resting lightly thereon and formed of lesser diameter than said tube to permit the free passage of oil therethrough, as and for the purpose specified.

3. In a lubricator for a motor-bearing, the combination with a fixed and open casing secured over said bearing and communicating therewith, of a metal lining to said casing having an orifice through the bottom thereof, a partition having a central orifice and downwardly-extending flanges supporting said partition from the-bottom of said lining, said partition dividing the interior contained Within said metal lining into a lower compartment for hard grease and an upper compartment for oil, a perforated tube fixedly secured and extending through said partition, hard grease and lining-bottom, and a rod of lesser diameter than said tube to permit the fiow of oil around the rod and through the tube and resting lightly on a shaft, as and for thepurpose specified.

Signed at Sault Ste. Marie, Ontario, this 23d day of December, 1905.

JAMES ARCHIBALD CRAIG. Witnesses:

WM. CARNEY,

S. GEO. STONE.

IOC 

